JP4307556B2 - Support arrangement for thin steel strip casting - Google Patents
Support arrangement for thin steel strip casting Download PDFInfo
- Publication number
- JP4307556B2 JP4307556B2 JP50105598A JP50105598A JP4307556B2 JP 4307556 B2 JP4307556 B2 JP 4307556B2 JP 50105598 A JP50105598 A JP 50105598A JP 50105598 A JP50105598 A JP 50105598A JP 4307556 B2 JP4307556 B2 JP 4307556B2
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- JP
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- Prior art keywords
- belt
- support
- support arrangement
- conveyor belt
- supporting
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 15
- 239000010959 steel Substances 0.000 title claims abstract description 15
- 238000005266 casting Methods 0.000 title claims abstract description 10
- 238000001816 cooling Methods 0.000 claims abstract description 10
- 239000002826 coolant Substances 0.000 claims description 11
- 239000007788 liquid Substances 0.000 abstract 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 239000012634 fragment Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000001681 protective effect Effects 0.000 description 2
- 229910001208 Crucible steel Inorganic materials 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- 239000010409 thin film Substances 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
- B22D11/06—Continuous casting of metals, i.e. casting in indefinite lengths into moulds with travelling walls, e.g. with rolls, plates, belts, caterpillars
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
- B22D11/06—Continuous casting of metals, i.e. casting in indefinite lengths into moulds with travelling walls, e.g. with rolls, plates, belts, caterpillars
- B22D11/0631—Continuous casting of metals, i.e. casting in indefinite lengths into moulds with travelling walls, e.g. with rolls, plates, belts, caterpillars formed by a travelling straight surface, e.g. through-like moulds, a belt
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
- B22D11/06—Continuous casting of metals, i.e. casting in indefinite lengths into moulds with travelling walls, e.g. with rolls, plates, belts, caterpillars
- B22D11/0637—Accessories therefor
- B22D11/0677—Accessories therefor for guiding, supporting or tensioning the casting belts
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Continuous Casting (AREA)
- Coating With Molten Metal (AREA)
- Induction Machinery (AREA)
- Structure Of Belt Conveyors (AREA)
- Laminated Bodies (AREA)
- Polymers With Sulfur, Phosphorus Or Metals In The Main Chain (AREA)
- Moulding By Coating Moulds (AREA)
- Belt Conveyors (AREA)
- Moulds, Cores, Or Mandrels (AREA)
Abstract
Description
本発明は薄鋼帯鋳造機内の特殊な支持配置に関する。
下から水で冷却される循環ベルト上に溶鋼が供給系を介して送られるような設備がここでは薄鋼帯鋳造機と称される。鋳込まれた鋼層の下面はそこでベルトに接触して凝固し、上面は自由表面として保護ガスのもとで、またはより良質な表面状態を達成するために、上ロールに接触して凝固する。完全凝固後に生成した鋳片（薄鋼帯）は循環搬送ベルトを離れ、ピッカによって継続搬送される。仕上圧延熱間圧延鋼帯において必要な厚み（１〜３ｍｍ）と十分な材料特性を達成するために、必要な熱間加工とに合わせて鋳造厚（約１０ｍｍ）は十分最適に選定することができる。最適な鋳造厚とは、極力少ない変形仕事で所要の熱間加工度が達成される厚さのことである。
循環搬送ベルトは、長い領域にわたって鋳片の冷却と殆ど摩擦のない支持とを可能にしている。このことから、鋳造機と圧延段との間を直接連結するための前提条件である高い鋳造速度と、普通鋼を鋳造するための基本条件としての高い生産性が得られる。
上方および前方から接近可能な循環ベルトが鋼の供給を容易にしている。他の方法におけるように２つのベルトまたはロール間の狭い隙間に鋼を通す必要はない。
循環ベルト用の搬送ロール間の領域内では、循環ベルトを冷却するために、鋼とは反対側のベルト面に冷却機構（好適なノズルを備えた水冷部）が配置されている。この冷却にもかかわらず、溶鋼がベルトの上面に加える高い温度によって循環ベルトは反ることになる。この反りは鋳片表面内の賦形となって現れる。この反りを防止するために冷却器内が負圧にされている。その圧力差によって循環ベルトは支持部に押付けられる。
従来使用されたバックアップロール（”Production of steel strip with a single-belt process”（「単ベルト法による鋼帯の生産」），K.-H. SpitzerおよびK. Schwertfeger、ＩＳＭ、１９９５年１１月、５１頁）は、従来は溝付き縦断面を有し、つまり（刊行物の図１２）バックアップロールが特色ある表面を有し、縦断面図におけるその断面は最小ロール径よりも大きな直径の断片を有する。これらの間隔の幅は従来、断片の間隔に実質的に一致していた。
このようなロール構造では、特に熱負荷によって循環搬送ベルト中に発生する応力を制御下に減退させることができなかった。過度に高い応力が安定性の限界を超えるや、直ちに循環ベルトは主に中央領域で反る。つまり従来使用されたロール構造では、循環ベルトの反りが引き続き鋳片の形状に望ましくない仕方で影響するので、生成した負圧は希望する結果をもたらさない。
そこで本発明の課題は、特に溶鋼装入領域で循環ベルトの反りが防止されるように、支持構造および支持配置を提供することにある。
この課題は請求の範囲１の特徴部分の特徴によって解決される。
本発明によれば、支持部が搬送ベルト表面領域では特にスキッド状に構成されており、搬送方向を横切って測定した支持部の間隔がこの方向における支持部の長さよりも大きい。一方ではベルト中の応力を十分に減退させることができ、他方では複数の支持部にわたってベルトの反りが起きることのないように、間隔は最適化されている。他方では支持部の空隙内でベルトの剛性はベルトの反りを実質的に起こさせないのに十分な強さである。特に、支持部の間ではベルト下面に加わる負圧によってベルトが実質的に１平面に保たれることによっても、反りの可能性は防止される。
好ましくは、搬送ベルトの循環方向での支持部の長さが横方向におけるよりも大きい。支持部は搬送ベルト下面に作用する負圧と合わせてベルトの緊張強化を引き起こし、ベルトの反りに対する安全性がこれによって高められる。
特に支持部は実質的に搬送ベルト下面の平面内で格子状に配置されており、その格子軸は好ましくは搬送方向に対して斜め、特に搬送方向に対して４５°の角度である。これにより、搬送ベルト内での応力の一層好ましい面分布が得られる。最も強い応力成分はベルトの横方向を向くのではないので、この方向ではもはや反りは生じ得ない。
格子（グリッド）空隙内、つまり支持部の間に、好ましくは搬送ベルトを冷却するために冷却材用のノズルが配置されている。これにより、特に、支持部間のベルト表面の問題の領域は強力に冷却することができる。バックアップロールを利用する場合とは異なり、所要の冷却材用に十分な空間を創造するために、支持部を十分に下方に延長することができるので、支持部の間の空間は冷却材用ノズルを配置するために一層容易に接近可能である。支持部は搬送ベルトに向き合うそれらの表面上で平らにしておくことができる。特に、搬送ベルト表面と支持部表面と冷却材との摩擦学系（tribulogischen）において摩擦を最小限に抑える被覆をこの表面に設けておくこともできる。特に支持部表面は支持部で支承される単数または複数のロールによって形成することができる。
搬送ベルトを冷却するためのノズルが本発明による支持部内に一体化することが好ましい。これらのノズルは、一方では、支持部間の空隙を冷却するものとすることができる。他方では、それとは独自に、搬送ベルト下面領域内で支持部表面に冷却材ガイドを支持部自体内に通すことができる。ベルトを支持部の載置面でも直接に冷却し、支持部とベルトとの間に滑り膜を生成する設計上の簡単な可能性がこれによって得られる。特に、円筒側面も含まれるこの載置面は実質的に平らであり、この支持部表面内に冷却材案内通路が配置されている。
他の好ましい実施態様では、特に支持部表面内に至るまで搬送ベルトの下面に通される複数のノズルを個々の支持部に配置しておくことができる。
図１、図２に略示した実施例に基づいて本発明を詳しく説明する。
図１は、搬送ベルトの下方の支持配置の平面図、図２は、搬送方向を横切る断面図である。
図１によれば支持部３、３′は格子軸２、２′を有する格子を形成し、格子軸２、２′は循環する搬送ベルトの搬送方向１に対して斜めである。支持部３、３′は格子軸２、２′の交点に配置されており、支持部３、３′の空隙内に冷却材供給用ノズル４が配置されている。
搬送ベルト５の下面６にまで達する支持部３、３′を図２に示し、見易くする理由からノズル４は図示しなかった。支持部３、３′は、搬送ベルト下面６の領域内に至るまで冷却材を供給するための案内通路７を有する。これにより、支持部表面８と搬送ベルト下面６との間の摩擦を防止する冷却材薄膜をこれらの面の間に生成することができる。
冷却材として一般に水が使用される。しかし排熱を強めるために支持部およびノズル用の２段冷却も考慮の対象になる。支持部は好ましくは空冷式または保護ガス冷却式としておくことができる。The present invention relates to a special support arrangement in a steel strip casting machine.
An installation in which molten steel is sent via a supply system onto a circulating belt cooled with water from below is referred to herein as a thin steel strip casting machine. The lower surface of the cast steel layer then solidifies in contact with the belt and the upper surface solidifies in contact with the upper roll under protective gas as a free surface or to achieve a better surface condition . The slab (thin steel strip) generated after complete solidification leaves the circulation conveyance belt and is continuously conveyed by the picker. In order to achieve the necessary thickness (1-3mm) and sufficient material properties in the finish rolled hot-rolled steel strip, the casting thickness (about 10mm) should be selected sufficiently optimally according to the required hot working. it can. The optimum casting thickness is a thickness that achieves the required hot workability with as little deformation work as possible.
Circulating conveyor belts allow cooling of the slab and support with little friction over a long area. From this, a high casting speed, which is a precondition for directly connecting the casting machine and the rolling stage, and high productivity as a basic condition for casting ordinary steel can be obtained.
A circulating belt accessible from above and from the front facilitates the supply of steel. There is no need to pass steel through a narrow gap between two belts or rolls as in other methods.
In the region between the conveying belts for the circulation belt, in order to cool the circulation belt, a cooling mechanism (a water cooling part having a suitable nozzle) is arranged on the belt surface opposite to the steel. Despite this cooling, the circulating belt warps due to the high temperature that the molten steel applies to the upper surface of the belt. This warpage appears as shaping within the slab surface. In order to prevent this warpage, the inside of the cooler is set to a negative pressure. The circulation belt is pressed against the support portion by the pressure difference.
Conventionally used backup roll (“Production of steel strip with a single-belt process”), K.-H. Spitzer and K. Schwertfeger, ISM, November 1995, Page 51) conventionally has a grooved longitudinal section, ie (published figure 12), the backup roll has a distinctive surface, the section of which in the longitudinal section is a fragment with a diameter larger than the minimum roll diameter. Have. The width of these intervals has heretofore substantially matched the spacing of the fragments.
With such a roll structure, it was not possible to reduce the stress generated in the circulating and conveying belt due to a thermal load under control. As soon as the excessively high stress exceeds the stability limit, the circulating belt warps mainly in the central region. In other words, in the roll structure used in the past, the generated negative pressure does not produce the desired result because the curvature of the circulation belt continues to affect the shape of the slab in an undesirable manner.
Accordingly, an object of the present invention is to provide a support structure and a support arrangement so that the circulation belt is prevented from warping, particularly in the molten steel charging region.
This problem is solved by the features of the characterizing portion of claim 1.
According to the present invention, the support portion is configured in a skid shape particularly in the transport belt surface region, and the interval between the support portions measured across the transport direction is larger than the length of the support portion in this direction. On the one hand, the distance in the belt is optimized so that the stress in the belt can be sufficiently reduced, and on the other hand, the belt does not warp across a plurality of supports. On the other hand, the rigidity of the belt within the gap of the support is strong enough not to cause substantial belt warpage. In particular, the possibility of warping can be prevented by maintaining the belt substantially in one plane by the negative pressure applied to the lower surface of the belt between the support portions.
Preferably, the length of the support portion in the circulation direction of the conveyor belt is larger than that in the lateral direction. The support portion, combined with the negative pressure acting on the lower surface of the transport belt, causes the belt tension to be strengthened, thereby enhancing the safety against the belt warpage.
In particular, the support portions are arranged in a lattice shape substantially in the plane of the lower surface of the transport belt, and the lattice axis thereof is preferably oblique with respect to the transport direction, in particular at an angle of 45 ° with respect to the transport direction. Thereby, a more preferable surface distribution of the stress in the conveyor belt can be obtained. Since the strongest stress component does not point in the lateral direction of the belt, warping can no longer occur in this direction.
Coolant nozzles are preferably arranged in the grid gap, i.e. between the supports, to cool the conveyor belt. Thereby, in particular, the problem area of the belt surface between the supports can be cooled strongly. Unlike using a backup roll, the support can be extended sufficiently downward to create enough space for the required coolant, so the space between the supports is a coolant nozzle. Is more easily accessible for positioning. The supports can be flat on their surface facing the conveyor belt. In particular, a coating that minimizes friction in the tribology of the conveyor belt surface, the support surface and the coolant can be provided on this surface. In particular, the support surface can be formed by one or more rolls supported by the support.
A nozzle for cooling the conveyor belt is preferably integrated in the support according to the invention. On the one hand, these nozzles can cool the gaps between the supports. On the other hand, independently, the coolant guide can be passed through the support part itself in the lower surface area of the conveyor belt. This provides a simple design possibility of cooling the belt directly on the mounting surface of the support and creating a sliding membrane between the support and the belt. In particular, the mounting surface including the cylindrical side surface is substantially flat, and the coolant guide passage is disposed in the surface of the support portion.
In another preferred embodiment, a plurality of nozzles that are passed through the lower surface of the conveying belt, particularly in the support portion surface, can be arranged in each support portion.
The present invention will be described in detail based on the embodiment schematically shown in FIGS.
FIG. 1 is a plan view of a support arrangement below the conveyance belt, and FIG. 2 is a cross-sectional view across the conveyance direction.
According to FIG. 1, the supports 3, 3 'form a grid having
The support portions 3, 3 'reaching the lower surface 6 of the
Water is generally used as the coolant. However, in order to increase the exhaust heat, two-stage cooling for the support portion and the nozzle is also considered. The support can preferably be air cooled or protective gas cooled.
Claims (6)
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19622929A DE19622929C2 (en) | 1996-06-07 | 1996-06-07 | Support arrangement for thin strip casting |
| DE19622929.4 | 1996-06-07 | ||
| PCT/DE1997/001150 WO1997047411A1 (en) | 1996-06-07 | 1997-06-03 | Supporting arrangement for thin strip casting |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2001509736A JP2001509736A (en) | 2001-07-24 |
| JP4307556B2 true JP4307556B2 (en) | 2009-08-05 |
Family
ID=7796416
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP50105598A Expired - Fee Related JP4307556B2 (en) | 1996-06-07 | 1997-06-03 | Support arrangement for thin steel strip casting |
Country Status (13)
| Country | Link |
|---|---|
| US (1) | US6123186A (en) |
| EP (1) | EP0934133B1 (en) |
| JP (1) | JP4307556B2 (en) |
| KR (1) | KR20000016442A (en) |
| AT (1) | ATE200751T1 (en) |
| AU (1) | AU3164497A (en) |
| BR (1) | BR9709649A (en) |
| DE (2) | DE19622929C2 (en) |
| DK (1) | DK0934133T3 (en) |
| ES (1) | ES2155996T3 (en) |
| RU (1) | RU2153951C1 (en) |
| WO (1) | WO1997047411A1 (en) |
| ZA (1) | ZA974483B (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19908127A1 (en) * | 1999-02-25 | 2000-09-07 | Santrade Ltd | Plant processing thin layers of low-viscosity melt supplied onto conveyor belt to form solid product by heating or cooling, includes belt edge turn-up rollers and magnetic hold-down, maximizing product precision |
| US6386267B1 (en) * | 1999-07-30 | 2002-05-14 | Hazelett Strip-Casting Corporation | Non-rotating, levitating, cylindrical air-pillow apparatus and method for supporting and guiding an endless flexible casting belt into the entrance of a continuous metal-casting machine |
| SE526909C2 (en) | 2003-04-29 | 2005-11-15 | Abb Ab | Wrist housing with through channel for cabling to a robotic arm |
| CN105728674A (en) * | 2016-04-05 | 2016-07-06 | 江苏国能合金科技有限公司 | Amorphous thin belt production device capable of controlling spraying belt gap |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3933193A (en) * | 1971-02-16 | 1976-01-20 | Alcan Research And Development Limited | Apparatus for continuous casting of metal strip between moving belts |
| CH624322A5 (en) * | 1977-03-04 | 1981-07-31 | Larex Ag | Device for cooling and guiding a revolving mould belt in a continuous casting installation |
| US4193440A (en) * | 1978-09-01 | 1980-03-18 | Alcan Research And Development Limited | Belt-cooling and guiding means for the continuous belt casting of metal strip |
| SE420533B (en) * | 1979-09-06 | 1981-10-12 | Luossavaara Kiirunavaara Ab | DEVICE FOR HEATING OR HEAT TREATMENT OF A MATERIAL BED, SUPPOSED BY AN UPPER PARTY OF AN ENDLESS PERFORCED TYPE OF TRANSPORT |
-
1996
- 1996-06-07 DE DE19622929A patent/DE19622929C2/en not_active Expired - Fee Related
-
1997
- 1997-05-22 ZA ZA9704483A patent/ZA974483B/en unknown
- 1997-06-03 KR KR1019980710026A patent/KR20000016442A/en not_active Application Discontinuation
- 1997-06-03 RU RU99100097/02A patent/RU2153951C1/en not_active IP Right Cessation
- 1997-06-03 AT AT97926985T patent/ATE200751T1/en active
- 1997-06-03 BR BR9709649A patent/BR9709649A/en not_active IP Right Cessation
- 1997-06-03 JP JP50105598A patent/JP4307556B2/en not_active Expired - Fee Related
- 1997-06-03 DK DK97926985T patent/DK0934133T3/en active
- 1997-06-03 US US09/194,843 patent/US6123186A/en not_active Expired - Lifetime
- 1997-06-03 ES ES97926985T patent/ES2155996T3/en not_active Expired - Lifetime
- 1997-06-03 AU AU31644/97A patent/AU3164497A/en not_active Abandoned
- 1997-06-03 EP EP97926985A patent/EP0934133B1/en not_active Expired - Lifetime
- 1997-06-03 DE DE59703448T patent/DE59703448D1/en not_active Expired - Lifetime
- 1997-06-03 WO PCT/DE1997/001150 patent/WO1997047411A1/en not_active Application Discontinuation
Also Published As
| Publication number | Publication date |
|---|---|
| EP0934133A1 (en) | 1999-08-11 |
| US6123186A (en) | 2000-09-26 |
| AU3164497A (en) | 1998-01-07 |
| KR20000016442A (en) | 2000-03-25 |
| WO1997047411A1 (en) | 1997-12-18 |
| ZA974483B (en) | 1997-12-29 |
| ES2155996T3 (en) | 2001-06-01 |
| ATE200751T1 (en) | 2001-05-15 |
| JP2001509736A (en) | 2001-07-24 |
| DK0934133T3 (en) | 2001-05-28 |
| DE19622929C2 (en) | 1998-05-28 |
| DE19622929A1 (en) | 1997-12-11 |
| EP0934133B1 (en) | 2001-04-25 |
| RU2153951C1 (en) | 2000-08-10 |
| BR9709649A (en) | 1999-08-10 |
| DE59703448D1 (en) | 2001-05-31 |
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